With the help of two examples name the map and reduce function purpose


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More MapReduce Interview Questions

Can we submit the mapreduce job from slave node?

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What happens when a datanode fails ?

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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

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what are the basic parameters of a Mapper?

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What are ‘reduces’?

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Where is Mapper output stored?

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How data is spilt in Hadoop?

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What is the purpose of textinputformat?

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What is the relationship between Job and Task in Hadoop?

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What is a "reducer" in Hadoop?

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What is OutputCommitter?

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What is a Distributed Cache in Hadoop?

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